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In prokaryotic cells, translation of an mRNA begins before its transcription has been completed. This phenomenon is called _____ of transcription and translation.

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Final answer:

In prokaryotic cells, translation can start before transcription is finished, a process known as coupling of transcription and translation, leading to efficient protein synthesis.

Step-by-step explanation:

In prokaryotic cells, the phenomenon where translation of an mRNA begins before its transcription has been completed is called coupling of transcription and translation. Unlike eukaryotic cells, prokaryotes do not have a membrane-enclosed nucleus, which allows them to perform transcription and translation concurrently in the cytoplasm. This coupling enables the efficient synthesis of proteins, as multiple ribosomes, known as polyribosomes or polysomes, can initiate the translation of an mRNA molecule even before the transcription process is fully completed.

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